Its about 20ft by 10ft.
													
																	Pitched roof against wall. 
									
	
		
	
																	Here is an attempt though maybe not a very good one to make the roof flashing serve also as a through the wall flashing with a tile roof. 
																	Drill holes at these marks to allow a 6 nail to be driven through the wall plate into the joists. 
																	Proper roof wall abutment flashing examples. 
																	Below are two photographs of roof wall step flashing completed and effective of a slate roof against a brick wall below left and in process with step flashing against a dormer sidewall before the dormer siding has been put in place below right. 
															
													
									
	
		
	
																	The flat roofing material must go up the wall a minimum of 12 or up the wall and over the top of the wall if the wall is less than 12 high. 
																	2 of the walls come against a vertical wall the 1st floor. 
																	Lay a thick layer of cement on existing brick work then place the wall plate on this and get a good level. 
																	Discussion in roofing and guttering started by rexmundo 17 nov 2006. 
															
													
									
	
		
	
																	Line up wall plate against existing joists and make a mark on the wall plate in line with the centre of the joists. 
																	Pitched roof against a vertical wall.